Don't worry so much about xp draining. except for becoming immune to fear the clev has much less impact on a warrior than stats and equipment do. Most things that drain xp will be ripping out your hp at a far quicker rate than they are ripping off your hp...

The biggest bonus with warriors is they don't need many xp anyway!

like every other class, pick your fights. don't go so far from the stairs. only go further afield if there is something you are looking for.

remember, int/wis/chr are pretty irrelevant stats for you.... sure there are some breakpoints and it is nice to have them above 3 but other than that... they have to be tragic to bother scumming to fix stats.